Adrian and Kevin just finished a 21 hour course in basic piano tuning the I held at Beaches Conservatory in Scarborough, Ontario, Canada.
We learned how to hear beats clearly using a beat filter and used my Beat Speed Window temperament sequence that helps tuners measure inharmonicity aurally and choose the best size for the particular piano you are tuning.
It also reduces the need to know intervals because the sequence is laid out note by note and because of the high accuracy built on the inharmonicity of that specific piano, notes that need correcting just need to fit with the one check that tuned them in the first place. No multiple interval checks needed.
Both students seemed to enjoy following the objective logic of the system.
I teach every March and August in Toronto, but I will make exceptions if there is demand.